Fastening device



FIG. 1 is a first perspective view of a fastening device showing my new design;

FIG. 2 is a second perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a third perspective view thereof;

FIG. 5 is a fourth perspective view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a side view thereof, the opposite side being identical. 

CLAIM The ornamental design for a fastening device, as shown and described. 